Staking-machine.



F. LiPERKINS.

STAKING MACHINE.

APPLICATION rum) JAN. 11, 1909.

Patented July 6, 1909.

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STAKING MACHINE. APPLIGA'I'IOH FILED JAN. 11, 1909.

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Patented July 6, 1909.

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STAKING MACHINE. APPLIGATION mum JAN. 11, 1909.

926,826. Patented July 6, 1909.

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FRANKLIN J. PERKINS, OF WOBURN, MASSACHUSETTS.

STAKING-MAGHINE Specification of Letters Patent.

Patented July 6, 1909.

Application filed January 11, 1909. Serial No. 471,549.

To all whom if may concern:

Be it known that I, FRANKLIN JAY PER- KINS, a citizen of the United States, residing in VVoburn, county of htliddlesex, and State of Massachusetts, have invented an Improvement in Staking-lvlachines, of which the fol lowing description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to a machine for treating hides, skins and leather and is herein shown as embodied in a staking machine.

The invention has for its object to provide a simple and efficient machine with which skins may be effectively staked with. a 1nini mum amount of labor on the part of the op erator. For this purpose, the machine is provided with staking tools, which. engage the opposite surfaces of the leather and are movable in substantially the same are of a circle, and with which cooperate means within the are described by said tools for holding the leather against movement with the said tools.

These and other features of this invention will be pointed out in the claims at the end of this specification.

Figure 1. is a side elevation of a staking machine einbodying this invention. Fig. 2, a vertical section taken on the line 2-2, Fig. 3, showing the staking tools in their operative position. Fig. 3, a plan view of the ma chine shown in Fig. 1, and Fig. 41, a front elevation of the machine shown in Fig. 1.

Referring to the drawings, a, 6, represent two staking tools, which may be of any suitable or usual construction, and which. are d csigncd to engage the opposite surfaces of the hide, skin. or leather 0, which will be hereinafter referred to as leather. The tools a, b, are designed to move in substantially the same circular path, while acting on the leather 0, and in the present instance, said tools are secured to pivoted supports. The support for the upper tool a is herein shown as a lever (Z mounted on a pivot pin or shaft 6, supported by the upright sides f, g, of the framework. The lever (1 may and preferably will be made as herein shown and consists of a curved front portion 13 having the pivot c as a center, and from which extend rearwardly diverging arms 12, which are pivotally mounted on the pin or shaft 0, and have substantially straight arms 10 beyond the said pivot (see Fig. 3). The support for the lower tool I) is shown as composed of two levers 14, 15, the lever being mounted on the pivot pin or shaft c, and the lever 14 being pivoted at 1.6 to the front end of the lever 15. The lever 14 has its front end curved with the pivot e as a center, so that both of the tools a, l), are and maybe moved in substantially the same circular path. The levers d and 15 are moved by mechanism as will be hereinafter described. The leather 0 while being acted upon. by the staking tools a, h, is held within the are described by the said. tools, by suitable jaws 18, 19, which maybe termed the holding jaws. The lower jaw 18 may be stationary and the upper jaw 19 movable, and in the present instance, the lower jaw 18 is located between the upright sides of the frame-work and is secured thereto in any suitable manner. The stationary jaw 18 may be secured to or form the front end. of a table 20 located between the upright sidesf, g, and secured thereto by screws 21. The upper clamping jaw 19 is movable and is attached. to a lever 22 pivoted at 23 to a lever 24, mounted on the pivot pin 0 and provided with a rearwardly extended arm 25, which cooperates with the periphery of a cam 26 fast on shaft 27 supported by the upright sides of the framework. The arm maybe provided with a roller 28, which engages the peripl'lery of the cam 26 and is held in contact therewith by a spring 29. The movable jaw 19 is held. in engagement with the work by a yielding pressure, which is obtained by a rubber or other spring 30 interposed between the rear end. of the lever 22 and the lever 24, and the pressure of the spring 30 may be regulated by a nut 31 engaging a bolt 32 fast to the lever 24 and extended loosely through the lever 22.

The lower staking tool b may be held in engagement with the work with a yielding pressure in a similar manner, that is, by a rubber or other spring 35 interposed between the lever 15 and the roar arm of the lever 14, and the pressure of said spring is regulated by a nut 36 engaging a bolt 37 fast to the lever 15 and extended loosely through the lever 14. The lever d carrying the upper staking tool is provided with studs 41 carrying rollers 42, which enter cam grooves 43 in the outer faces of cam disks 44 fast on the cam shaft 27, and the lever 15 of the carrier for the lower staking tool is provided with rearwardly extended arms l5 having studs 46 carrying rollers 47, which. enter cam grooves Til 48 in the inner faces of the cam disks 44. effect the same, and the movements above The arms 10, 45 of the levers cl, 15, have secured to them counterweight pieces 50, 51, respectively, which serve to steady the movement of the said levers by taking the weight off of the weak side of the cams 43, 48. The cam shaft 27 is provided as shown with fast and loose pulleys 55, 56.

In operation with the apparatus above described, the lever d carrying the upper stak ing tool and the levers 22, 24 carrying the movable jaw 19 are moved upward by their earns 43, 26, so as to afford a substantially wide opening between the upper staking tool a and jaw 19 and the lower staking tool I) and stationary jaw 18, for the ready insertion of the leather 0 to be staked.

In the open position of the tools and aws just described, the lower staking tool b is sub stantially on a level with the lower jaw 18 (see Fig. 1). After the work or leather 0 has been inserted between the staking tools a, b, and the holding jaws 1.8, 19, the machine is started in any suitable manner, and the cams 43, 26 acting on the levers d, 24, turn the same on their pivots so as to close the upper holding aw 19 and firmly grip the leather 0 between it and its cooperating lower jaw 18, and at or about the same time the upper staking tool is brought into engagement with the leather substantially in line with the lower staking tool I). The condition of the apparatus just described is substantially that shown in Fig. 1, and the leather is about to be staked or worked.

From the position shown in Fig. 1, the staking tools a, 5, travel downward together in contact with the work for a predetermined distance or until the staking tools are brought into their lowest position, which is substantially represented in Fig. 2. During the travel of the staking tools in a circular path from the position shown in Fig. 1 to that shown in Fig. 2, the leather 0 is worked by the tools a, b and at the completion of this movement of the staking tools, which may be termed the working stroke, the levers (Z, 24, are moved upward quickly, and faster than the lever 15 carrying the lower staking tool, so as to allow the operator opportunity to change the position of the leather for the next working stroke, during the time the lever 15 is being raised into substantially the position shown in Fig. 1. At or about the time the lever 15 reaches the end of its upward stroke, the lever 24 is moved down so as to close the jaw 19 upon the leather, and the lever (Z is also moved down so as to engage the leather shortly after the clamping jaw 19 has been closed, and thereafter the levers d, 15, are simultaneously moved down through their working stroke. The movements above described of the levers d, 15 carrying the staking tools, are effected by the cams 43, 48, which are suitably shaped and timed so as to described of the lever 24 carrying the clamping jaw 19 are effected by the cam 26 and spring 29, the cam 26 being properly shaped and timed to effect movement of the lever 24.

From the above description it will be seen that the workman can operate the machine and tend to the work from the front or side of the machine and while standing up or sitting down.

Provision is made for enabling the leather when released by the staking tools on their working stroke, to hang in a substantially vertical position and insure the lower staking tool being on the inside of the leather on its upstroke. In the present instance, this result is effected by locating the stationary holding jaw at the front of the machine and arranging the lower staking tool with its pivot substantially on a level with the stationary holding jaw, so that the downward stroke of the lower staking tool is away from and within a substantially vertical plane through the stationary holding jaw. To further insure the lower staking tool to pass on its upstroke on the inside of the leather, a movable pusher is employed to engage the leather and push or move it out when released by the staking tools. Inthe present instance, the pusher is shown as a sheet metal leaf 60 fast on a pivot rod 61 supported by the side frames and automatically turned to move the leaf outward by helical springs 62 encircling the pivot rod and fastened at one end to the frame and at the other end to the pivot rod.

In the position of the staking tools shown in Fig. 1, the leaf or pusher engages the lever 14, and on the down movement of the staking tools the leaf or pusher engages the arm 13 of the lever (Z.

Claims:

1. In a machine of the class described, in combination, working tools to engage the opposite surfaces of the work, an upper lever provided with a curved front portion carrying the upper one of said tools, a lever carrying the lower one of said tools, a second lever concentrically mounted with the upper tool carrying lever and to which the lower tool carrying lever is pivoted, a yielding medium interposed between the lower tool carrying lever and its supporting lever, cams to move said concentrically mounted levers,

clamping jaws interposed between said tool carrying levers, a lever carrying one of said clamping jaws, a lever to which the jaw carrying lever is pivoted, a yielding medium interposed between the jaw carrying lever and its supporting lever, and a cam to effect movement of the jaw carrying levers, substantially as described.

2. In a machine of the class described, in combination, clamping jaws to hold the leather, staking tools to engage the opposite sides of the leather, concentrically mounted levers carrying said staking tools, and means for oscillating said levers, said means having provision for moving one of said levers independently of the other to open and close said staking tools, substantially as described.

3. In a machine of the class described, in combination, staking tools to engage the opposite sides of the leather, concentrically mounted levers carrying said staking tools, means within the are described by said. staking tools for holding the leather, and means for moving said levers.

4. In a machine of the class described, in combination, working tools to engage the opposite surfaces of the leather, pivoted supports for said tools mounted to cause the said tools to move in substantially the same arc, means for effecting said movement, and means within the are described by said tools for holding the leather against movement with said tools, substantially as described.

5. In a machine of the class described, in combination, staking tools to engage the opposite surfaces of the leather, levers carrying said tools, means for moving said levers 81- l multancously in one direction and independently in the opposite direction, and means between said levers for holding the leather while it is being worked by the simultaneous movement of said levers, substan tially as described.

6. In a machine of the class described, in combination, a lover pivoted intermediate its ends and having at one end a curved arm having the pivot of the lever as a center, a working tool carried by said curved arm and movable in opposite directions in a circular path, means for oscillating said lever and tool, and means within the arc described by said tool for holding the leather while it is being worked by said tool, substantially as described.

7. In a machine of the class described, in combination, working tools to engage the opposite surfaces of the leather, pivoted sup ports for said tools mounted to cause the said tools to move in substantially the same are, means for effecting said movement, means within the are described by said tools for holding the leather against movement with said tools, and a spring-actuated pusher to engage the inner surface of the leather and push the same outward to insure engagement of the lower working tool with the inner surface of the leather on the up-stroke of said lower tool, substantially as described.

8. In a machine of the class described, in combination, working tools to engage the opposite surfaces of the leather, pivoted supports for said tools mounted to cause the said tools to move in substantially the same arc, means for effecting said movement, means within the are described by said tools for holding the leather against movement with said tools, and yielding means to engage the inner surface of the leather below the hold-' ing means, for the purpose specified.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

FRANKLIN J. PERKINS.

VJitnesses JAs. H. CHURCHILL, J. MURPHY. 

